| 冷弯厚壁钢管截面不同部位材料特性分布模型 |
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| 引用本文： | 沈祖炎,温东辉,李元齐,马越峰.冷弯厚壁钢管截面不同部位材料特性分布模型[J].同济大学学报(自然科学版),2016,44(7):0981-0990. |
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| 作者姓名： | 沈祖炎 温东辉 李元齐 马越峰 |
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| 作者单位： | 同济大学 土木工程学院，上海 200092；同济大学 土木工程防灾国家重点实验室，上海 200092,同济大学 土木工程学院，上海 200092；太原学院 建筑工程系，山西 太原 030032,同济大学 土木工程学院，上海 200092；同济大学 土木工程防灾国家重点实验室，上海 200092,上海宝钢型钢有限公司，上海 200050 |
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| 基金项目： | 国家自然科学基金(51178330)第一作者：沈祖炎(1935-),男,教授,中国工程院院士,主要研究方向为钢结构. E-mail:zyshen@tongji.edu.cn通讯作者：温东辉(1982-),女,主要研究方向为冷弯型钢结构抗震性能. E-mail:wendh9@163.com ,2,温东辉1,3,李元齐1,2,罗金辉1,马越峰4,朱少文5 |
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| 摘 要： | 对取自30种不同截面、不同厚度、不同钢材型号、不同厂家生产的冷弯厚壁矩形和方形钢管的568个试件进行了材料性能试验研究.结果表明:焊缝部位的屈服强度和极限强度相对于邻边均有提高;角部屈服强度提高系数随型钢中心线长与弯角内径之比的增大而增大,而各参数对极限强度的影响较小;焊缝两邻边间的强度差异很小.基于研究结果,提出了冷弯矩形和方形钢管屈服强度、极限强度、强屈比和伸长率沿截面的分布模型.当相应冷弯型钢截面的梁、柱强度和稳定分析中需要考虑冷弯效应的影响时,可以应用此分布模型.
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| 关 键 词： | 冷弯厚壁钢管 材性试验 屈服强度 冷弯效应 材料特性 |
| 收稿时间： | 2015/12/23 0:00:00 |
| 修稿时间： | 2016/5/18 0:00:00 |
Distribution Patterns of Material Properties for Cross section of Cold formed Thick walled Steel Rectangular Tubes |
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| SHEN Zuyan,WEN Donghui,LI Yuanqi and MA Yuefeng.Distribution Patterns of Material Properties for Cross section of Cold formed Thick walled Steel Rectangular Tubes[J].Journal of Tongji University(Natural Science),2016,44(7):0981-0990. |
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| Authors: | SHEN Zuyan WEN Donghui LI Yuanqi and MA Yuefeng |
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| Institution: | College of Civil Engineering, Tongji University, Shanghai 200092,China; State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China,College of Civil Engineering, Tongji University, Shanghai 200092,China; Department of Structural Engineering, Taiyuan University, Taiyuan 030032, China,College of Civil Engineering, Tongji University, Shanghai 200092,China; State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China and Shanghai Baosteel Steel Co., Ltd., Shanghai 200050, China |
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| Abstract: | Five hundred and sixty eight test coupons taken from thirty cold formed thick walled steel square and rectangular tubes with different sizes of sections, thickness of plates, grades of steel and different manufacturers were tested to investigate the effects of cold forming process on the material properties of different parts of sections. The test results indicate that the cold forming effects have obvious influence on the strength and ductility of cold formed thick walled sections. The difference of material properties between two adjacent plates connected to the plate containing weld can be ignored. The yield and tensile strength of weld portion and corner parts are enhanced compared with the adjacent plates. The yield strength enhancement factors of corner parts increase with the increase of the ratio of the length of centerline to the inside diameter of corners, but the enhancement factors for tensile strength are independent on the respective parameters. Based on the investigation, distribution patterns of yield strength, tensile strength, tensile to yield ratio and percentage elongation of cold formed thick walled steel rectangular hollow sections were proposed, which can be used for strength and stability analysis of corresponding beams and columns, while the cold forming effects are to be taken into account. |
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| Keywords: | cold formed thick walled tubular material test yield strength cold forming effect material property |
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